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Explore Scientific

Explore Scientific 5x Focal Extender (1.25″) – FE05-125

Explore Scientific 5x Focal Extender (1.25″) – FE05-125

$199.99
$199.99
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The Explore Scientific 5x Focal Extender (1.25″) FE05-125 is a high-performance optical accessory designed to significantly increase the magnification of compatible 1.25″ eyepieces. By multiplying the effective focal length by a factor of five, this focal extender unlocks high-power viewing potential for detailed observation of planets, lunar terrain, and compact deep-sky objects without the need to purchase additional high-power eyepieces. It preserves comfortable viewing with good eye relief and delivers bright, contrast-rich images when paired with premium eyepieces.

Engineered with advanced optical coatings and precision glass elements, the FE05-125 maximizes light transmission and minimizes internal reflections and flare. Its robust, precision-machined housing ensures secure, repeatable alignment in standard 1.25″ focusers and diagonals. This extender adds versatility to your eyepiece collection and lets you achieve powerful visual performance with the eyepieces you already own.

Brand

Explore Scientific

Features

  • 5× magnification increase expands the power of any compatible 1.25″ eyepiece

  • Advanced optical design for bright, high-contrast performance

  • Precision glass and coatings reduce internal reflections and flare

  • Maintains comfortable eye relief even at high magnification

  • Compact, lightweight format fits standard 1.25″ focusers and diagonals

  • Ideal for detailed planetary, lunar, and compact deep-sky observing

  • Enhances the utility of existing eyepiece collections

  • Robust construction for reliable optical alignment

Specifications

Specification Details
Model/SKU FE05-125
Type 5x Focal Extender (1.25″)
Magnification Factor 5×
Barrel Size 1.25″ O.D.
Optical Configuration Precision glass elements with advanced coatings
Lens Treatment Anti-reflection optimized multi-coatings
Length Approx. 130 mm
Width Approx. 48 mm
Weight Approx. 380 g
Compatibility Standard 1.25″ focusers and eyepiece holders
Included 5× focal extender unit
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Frequently Asked Questions

With a beginner telescope you can see a surprising amount — the craters and mountains on the Moon, the rings of Saturn, the moons of Jupiter, and star clusters like the Pleiades. As you get more comfortable, you can also spot nebulae and distant galaxies. Not sure which beginner telescope is right for you? Check out our Telescope Buying Guide.
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All telescopes on Telescope Wolves are hand-picked with beginners in mind. If you're unsure which telescope is right for you, check out our Telescope Buying Guide.
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